Staged snap hinge with adjustability

ABSTRACT

Systems and methods are disclosed for rotationally coupling housing portions of an information handling system. An information handling system includes a housing having a first housing portion and a second housing portion. The information handling system also includes a hinge assembly coupling the first and second housing portions, the hinge assembly comprising a first snapping band with a bi-stable structure having an engaged and a disengaged position, the first snapping band configured to engage when the first and second housing portions are rotated at a first angle, and a second snapping band with a bi-stable structure having an engaged and a disengaged position, the second snapping band configured to engage when the first and second housing portions are rotated at a second angle. In addition, the information handling system includes a flexible display coupled to the first housing portion and the second housing portion.

RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/250,525 filed Aug. 29, 2016, the contents of which is incorporated byreference herein.

TECHNICAL FIELD

This disclosure relates generally to information handling systems and,more particularly, to a staged snap hinge with adjustability.

BACKGROUND

As the value and use of information continues to increase, individualsand businesses seek additional ways to process and store information.One option available to users is information handling systems. Aninformation handling system generally processes, compiles, stores,and/or communicates information or data for business, personal, or otherpurposes thereby allowing users to take advantage of the value of theinformation. Because technology and information handling needs andrequirements vary between different users or applications, informationhandling systems may also vary regarding what information is handled,how the information is handled, how much information is processed,stored, or communicated, and how quickly and efficiently the informationmay be processed, stored, or communicated. The variations in informationhandling systems allow for information handling systems to be general orconfigured for a specific user or specific use such as financialtransaction processing, airline reservations, enterprise data storage,or global communications. In addition, information handling systems mayinclude a variety of hardware and software components that may beconfigured to process, store, and communicate information and mayinclude one or more computer systems, data storage systems, andnetworking systems.

Examples of information handling systems include portable informationhandling systems, such as, smart phones, tablet computers, notebookcomputers, media players, digital cameras, 2-in-1 tablet-laptopcombination computers, wireless organizers, and/or combinations thereof.A portable information handling system may generally be any device thata user may carry for handheld use and that includes a processor.Portable information handling systems may include one or more flexibledisplays that bend and flex as the portable information handling systemis adjusted between various positions by the user. Such bending maycause stress to the flexible display. Thus, it may be desirable tocontrol the stress caused to a display as the portable informationhandling system is adjusted between various positions.

SUMMARY

In some embodiments, an information handling system is disclosed thatincludes a housing having a first housing portion and a second housingportion. The system also includes a hinge assembly coupling the firstand second housing portions, the hinge assembly comprising a firstsnapping band with a bi-stable structure having an engaged and adisengaged position, the first snapping band configured to engage whenthe first and second housing portions are rotated at a first angle, anda second snapping band with a bi-stable structure having an engaged anda disengaged position, the second snapping band configured to engagewhen the first and second housing portions are rotated at a secondangle. In addition, the system includes a flexible display coupled tothe first housing portion and the second housing portion, the flexibledisplay covering the hinge assembly, the flexible display configured tobend when the first and second housing portions are rotated.

In another embodiment, a method is disclosed that includes rotationallycoupling a first housing portion and a second housing portion of theportable information handling system with a hinge assembly, the hingeassembly comprising a first snapping band with a bi-stable structurehaving an engaged and a disengaged position, the first snapping bandconfigured to engage when the first and second housing portions arerotated at a first angle, and a second snapping band with a bi-stablestructure having an engaged and a disengaged position, the secondsnapping band configured to engage when the first and second housingportions are rotated at a second angle. The method also includescoupling a flexible display to the first housing portion and the secondhousing portion, the flexible display covering a portion of the hingeassembly, the flexible display configured to bend when the first andsecond housing portions are rotated.

In a further embodiment, a hinge assembly for an information handlingsystem is disclosed that includes a first snapping band with a bi-stablestructure having an engaged and a disengaged position, the firstsnapping band configured to engage when a first housing portion of theinformation handling system is rotated at a first angle to a secondhousing portion of the information handling system. The system alsoincludes a second snapping band with a bi-stable structure having anengaged and a disengaged position, the second snapping band configuredto engage when the first housing portion is rotated at a second angle tothe second housing portion.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention and itsfeatures and advantages, reference is now made to the followingdescription, taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 illustrates a block diagram of selected elements of an embodimentof a portable information handling system;

FIG. 2 illustrates a perspective view of a portable information handlingsystem having rotationally-coupled housing portions;

FIG. 2A illustrates a snapping band in disengaged position;

FIG. 2B illustrates a snapping band in engaged position;

FIG. 3A illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a fully open position;

FIG. 3B illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a partially open position;

FIG. 3C illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a partially open position;

FIG. 3D illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a closed position;

FIG. 4A illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a fully open position;

FIG. 4B illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a partially open position;

FIG. 4C illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a partially open position;

FIG. 4D illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a closed position; and

FIG. 5 illustrates a flowchart depicting selected elements of anembodiment of a method for rotationally coupling housing portions of aninformation handling system.

DETAILED DESCRIPTION

In the following description, details are set forth by way of example tofacilitate discussion of the disclosed subject matter. It should beapparent to a person of ordinary skill in the field, however, that thedisclosed embodiments are exemplary and not exhaustive of all possibleembodiments.

As used herein, a hyphenated form of a reference numeral refers to aspecific instance of an element and the un-hyphenated form of thereference numeral refers to the collective or generic element. Thus, forexample, widget “72-1” refers to an instance of a widget class, whichmay be referred to collectively as widgets “72” and any one of which maybe referred to generically as a widget “72.”

As noted previously, portable information handling systems may includeone or more flexible displays. Such displays may bend as the portableinformation handling system is rotated, bent, and/or adjusted todifferent positions. Such bending may cause stress (e.g., tensilestress) on the flexible display at or near the bend location(s), whichin turn may affect the structural integrity, performance, and/ordurability of the display. For example, a flexible display may extendover a portion of a hinge assembly rotationally coupling housingportions of the portable information handling system. As the housingportions rotate to different positions relative to each other, theflexible display may bend at different degrees, resulting in varyingamounts of stress on the flexible display at or near the hinge location.As described in more detail below, the hinge assembly may be designed tocontrol and reduce the stress on the flexible display as the housingportions are rotated.

For the purposes of this disclosure, an information handling system mayinclude an instrumentality or an aggregate of instrumentalities operableto compute, classify, process, transmit, receive, retrieve, originate,switch, store, display, manifest, detect, record, reproduce, handle, orutilize various forms of information, intelligence, or data forbusiness, scientific, control, entertainment, or other purposes. Forexample, an information handling system may be a server, a personalcomputer, a PDA, a consumer electronic device, a network storage device,or another suitable device and may vary in size, shape, performance,functionality, and price. The information handling system may includememory, one or more processing resources such as a central processingunit (CPU) or hardware or software control logic. Additional componentsof the information handling system may include one or more storagedevices, one or more communications ports for communicating withexternal devices as well as various input and output (I/O) devices, suchas a keyboard, a mouse, and a video display. The information handlingsystem may also include one or more buses operable to transmitcommunication between the various hardware components.

Particular embodiments are best understood by reference to FIGS. 1-5wherein like numbers are used to indicate like and corresponding parts.

FIG. 1 illustrates a block diagram of selected elements of an embodimentof a portable information handling system 100 in accordance with someembodiments of the present disclosure. In various embodiments, portableinformation handling system 100 may represent different types ofportable information handling systems, such as, smart phones, tabletcomputers, notebook computers, media players, digital cameras, 2-in-1tablet-laptop combination computers, and wireless organizers. Componentsof portable information handling system 100 may include, but are notlimited to, processor subsystem 120, which may comprise one or moreprocessors, and system bus 121 that communicatively couples varioussystem components to processor subsystem 120 including, for example,memory subsystem 130, I/O subsystem 140, local storage resource 150, andnetwork interface 160. External or remote elements, such as network 165,are also shown to give context to an environment in which portableinformation handling system 100 may be configured to operate.

Processor subsystem 120 may comprise a system, device, or apparatusoperable to interpret and/or execute program instructions and/or processdata, and may include a microprocessor, microcontroller, digital signalprocessor (DSP), application specific integrated circuit (ASIC), oranother digital or analog circuitry configured to interpret and/orexecute program instructions and/or process data. In some embodiments,processor subsystem 120 may interpret and/or execute programinstructions and/or process data stored locally (e.g., in memorysubsystem 130). In the same or alternative embodiments, processorsubsystem 120 may interpret and/or execute program instructions and/orprocess data stored remotely (e.g., in a network storage resource, notshown).

System bus 121 may represent a variety of suitable types of busstructures, including for example, a memory bus, a peripheral bus, or alocal bus using various bus architectures in selected embodiments. Forexample, such architectures may include, but are not limited to, MicroChannel Architecture (MCA) bus, Industry Standard Architecture (ISA)bus, Enhanced ISA (EISA) bus, PCI bus, PCI-E bus, HyperTransport (HT)bus, Integrated Interchip Sound (IIS) bus, Serial Peripheral Interface(SPI) bus, and Video Electronics Standards Association (VESA) local bus,among others. Although illustrated as a single bus in FIG. 1, system bus121 may be implemented as a combination of one or more suitable busses,and in some embodiments, various components may use one or moredifferent busses to communicate with other components of portableinformation handling system 100.

Memory subsystem 130 may comprise a system, device, or apparatusoperable to retain and/or retrieve program instructions and/or data fora period of time (e.g., computer-readable media). Memory subsystem 130may comprise random access memory (RAM), electrically erasableprogrammable read-only memory (EEPROM), a PCMCIA card, flash memory,magnetic storage, opto-magnetic storage, and/or a suitable selectionand/or array of volatile or non-volatile memory that retains data afterpower to its associated information handling system, such as portableinformation handling system 100, is powered down.

In portable information handling system 100, I/O subsystem 140 maycomprise a system, device, or apparatus generally operable to receiveand/or transmit data to/from/within portable information handling system100. I/O subsystem 140 may represent, for example, a variety ofcommunication interfaces, graphics interfaces, video interfaces, userinput interfaces, and/or peripheral interfaces. For example, I/Osubsystem 140 may comprise a touch panel and display adapter. The touchpanel (not shown) may include circuitry for enabling touch functionalityin conjunction with a display (not shown) that is driven by displayadapter (not shown).

Local storage resource 150 may comprise computer-readable media (e.g.,hard disk drive, floppy disk drive, CD-ROM, and/or other type ofrotating storage media, flash memory, EEPROM, and/or another type ofsolid state storage media) and may be generally operable to storeinstructions and/or data. For example, local storage resource 150 maystore executable code in the form of program files that may be loadedinto memory 130 for execution. In addition to local storage resources150, in some embodiments, portable information handling system 100 maycommunicatively couple via network 165 to a network storage resource(not shown) using network interface 160 discussed below.

Network interface 160 may be a suitable system, apparatus, or deviceoperable to serve as an interface between portable information handlingsystem 100 and network 165. Network interface 160 may enable portableinformation handling system 100 to communicate over network 165 usingany suitable transmission protocol and/or standard, including, but notlimited to various transmission protocols and/or standards. Network 165coupled to network interface 160 may be implemented as, or may be a partof, a storage area network (SAN), personal area network (PAN), localarea network (LAN), a metropolitan area network (MAN), a wide areanetwork (WAN), a wireless local area network (WLAN), a virtual privatenetwork (VPN), an intranet, the Internet or another appropriatearchitecture or system that facilitates the communication of signals,data and/or messages (generally referred to as data or information). Insome embodiments, network 165 communicatively coupled to networkinterface 160 may transmit data using a desired storage and/orcommunication protocol, including, but not limited to, Fibre Channel,Frame Relay, Asynchronous Transfer Mode (ATM), Internet protocol (IP),other packet-based protocol, small computer system interface (SCSI),Internet SCSI (iSCSI), Serial Attached SCSI (SAS) or another transportthat operates with the SCSI protocol, advanced technology attachment(ATA), serial ATA (SATA), advanced technology attachment packetinterface (ATAPI), serial storage architecture (SSA), integrated driveelectronics (IDE), and/or any combination thereof. Network 165, networkinterface 160, and/or various components associated therewith may beimplemented using hardware, software, or any combination thereof.Network interface 160 may enable wired and/or wireless communications toand/or from portable information handling system 100.

FIG. 2 is a perspective view of a portable information handling systemhaving rotationally-coupled housing portions. In the example embodiment,a main housing portion 12 rotationally couples to a lid housing portion14 to support various configurations to interact with an end user. Morespecifically, main housing portion 12 couples to lid housing portion 14via hinge assembly 34 such that a user may rotate main housing portion12 and/or lid housing portion 14 relative to each other. Main housingportion 12 and lid housing portion 14 may hold one or more components ofthe portable information handling system, including but not limited toprocessor subsystem 120, system bus 121, memory subsystem 130, I/Osubsystem 140, local storage resource 150, and network interface 160discussed above with respect to FIG. 1.

In some embodiments, portable information handling system 10 may includeone or more displays for visually presenting information. For example,display 28 may be a touch panel with circuitry enabling touchfunctionality in conjunction with a display such that a user may provideinput to portable information handling system 10 through the display. Insome embodiments, display 28 may be flexible such that it can bend andchange shapes while still visually presenting information to and/oraccepting input from the user. For example, display 28 may be an organiclight-emitting diode (OLED) formed on a flexible plastic, such aspolyethylene terephthalate. In some embodiments, display 28 may coupleto main housing portion 12 and lid housing portion 14 such that display28 extends over at least some portion of hinge assembly 34.

As explained below in further detail, hinge assembly 34 allows mainhousing portion 12 and lid housing portion 14 to rotate between aplurality of positions. For example, when portable information handlingsystem 10 is not in use, lid housing portion 14 may be closed over thetop of main housing portion 12 so that display 28 is protected fromunintended use or damage. Rotation of lid housing portion 14 byapproximately 90 degrees from main housing portion 12 brings display 28in a raised “laptop” position. In some embodiments, laptop position mayrepresent lid housing portion 14 open between approximately 1 and 179degrees from main housing portion 12 (as illustrated in FIG. 2).Rotation of lid housing portion at approximately 180 degrees from mainhousing portion 12 may place portable information handling system 10 in“tablet” and/or “table” position. In tablet position, display 28 is flatand exposed to accept touch inputs and display information. Display 28may bend at varying degrees as portable information handling system 10is moved between positions (e.g., tablet, laptop, closed positions). Inany position, user inputs may be communicated to an I/O subsystem and/orprocessor subsystem of the portable information handling system forprocessing, and then updated information may be communicated back todisplay 28 for displaying to the user.

In some embodiments, the hinge assembly of the portable informationhandling system may be a staged snap hinge. For example, hinge assembly34 may include one or more snapping bands 24 formed of an arched andcurved material. When the portable information handling system is inclosed position, snapping bands 24 may be disengaged, such that thesnapping bands curl and cause the housing portions to maintain a closedposition. As the housing portions are rotated apart (e.g., from closedto laptop or tablet mode), snapping bands 24 may engage to hold hingeassembly 34 in the selected position. Hinge assembly may also includestabilizer 22 that bends to different positions and provides stabilityto hinge assembly 34.

Snapping bands 24 may be a bi-stable structure formed of two curvatureaxes. FIG. 2A illustrates a snapping band in disengaged position.Snapping band 24 may be formed of a resilient flexible material thatcurls lengthwise (e.g., to form curve 30) in disengaged position.Snapping band 24 may be comprised of a carbon fiber or Kevlar™composite, tempered or spring steel, and/or other resilient flexiblematerials. The materials of snapping bands 24 may be manufactured orprocessed such that the band curls lengthwise in a disengaged position.FIG. 2B illustrates a snapping band in an engaged position. Snappingband 24 also include a widthwise curve, illustrated by curve 32. Assnapping band 24 is rolled out straight, the widthwise curve of snappingband 24 provides a counter force to the curling force of the lengthwisecurve. In engaged position, snapping band 24 snaps into a lengthwisestraight position such that the forces on curvature axes offset eachother. The stability and operation of snapping band 24 may be dependenton the material, thickness, dimensions, curve, and/or curvature axes ofthe snapping band.

Returning now to FIG. 2, one or more snapping bands 24 may be used hingeassembly 34. In closed position, snapping bands 24 may be disengaged,such that the lengthwise curl applies a force to curl the ends of theband toward each other (e.g., to the position illustrated in FIG. 2A).Snapping bands 24 may be placed in hinge assembly 34 such that the forceof the lengthwise curl applies a closing force on the hinge assembly. Asthe housing portions of portable information handling system 10 arerotated open from closed position one or more snapping bands 24 mayengage (e.g., to the position illustrated in FIG. 2B), such that thesnapping band(s) straighten out lengthwise and cease to apply a closingforce on the hinge assembly. In engaged position, snapping band 24 mayhelp offset the closing force from the lengthwise curling of otherdisengaged snapping bands 24. As explained in more detail below withrespect to FIGS. 3 and 4, snapping bands 24 may be staged to engage atdifferent rotational positions of hinge assembly 34. Thus, snappingbands 24 may be used to control the rotation of hinge assembly 34 andthe housing portions coupled to the hinge assembly.

The hinge assembly of the portable information handling system may alsoinclude one or more stabilizer materials. Stabilizer 22 may be comprisedof a rigid yet bendable material. In some embodiments, stabilizer 22 maybe comprised of a composite of metal, such as annealed copper.Stabilizer 22 may change shape (e.g., bend or fold) in response toapplied force, such as when a user opens and/or closes the housingportions of portable information handling system 10. The rigidity ofstabilizer 22 may affect how much force is required to rotate hingeassembly 34 open and closed. Thus, stabilizer 22 may hold the housingportions of portable information handling system 10 in a particularposition and resist unintended movements of the housing portions causedby, for example, user adjustment of the system in his or her lap orhands. In some embodiments, stabilizer 22 may include one morelengthwise slits (as illustrated in FIG. 2) to control the bendingdirection and/or rigidity of stabilizer 22. The size, shape, design, andmaterial of stabilizer 22 may be selected based on the design,structural integrity, performance, cost, and/or durability of hingeassembly 34 and/or portable information handling system 10.

As explained above, hinge assembly 34 may rotationally couple thehousing portions of the portable information handling system. One ormore snapping bands 24 and/or stabilizers 22 may couple to main housingportion 12 and lid housing portion 14. In some embodiments, hingeassembly 34 may also include one or more coupling materials 26. Couplingmaterial 26 may extend between main housing portion 12 and lid housingportion 14. Coupling material 26 may also couple to snapping bands 24and/or stabilizer 22. As hinge assembly 34 rotates, coupling material 26may bend or fold to the different rotational positions. In someembodiments, coupling material 26 may be formed of a resilient flexiblematerial, similar to those discussed above with respect to snappingbands 24 (e.g., carbon fiber or Kevlar™ composite, tampered or springsteel, and/or other resilient flexible materials). In some embodiments,coupling material 26 may be manufactured or processed such that thematerial curls lengthwise, thereby adding an additional closing force tohinge assembly 34.

In some embodiments, the reverse side of the hinge assembly (e.g., theside not covered by display 28) may include an elastic cover 29. Elasticcover 29 may be comprised of a malleable material, such as an elasticthermoplastic, that may compress and/or stretch as the housing portionsrotate in different positions to each other. Elastic cover 29 may extendfrom main housing portion 12 to lid housing portion 14 such that itcovers hinge assembly 34. Elastic cover 29 protects snapping bands 24and/or stabilizer 22 from direct contact by objects and debris externalto the portable information handling system. Elastic cover 29 may alsoprovide stability to hinge assembly 34 by restricting the movement ofsnapping bands 24 and/or stabilizer 22.

Snapping bands may be staged in different arrangements within hingeassembly 34. FIGS. 3A-D illustrate a gap staged arrangement of snappingbands in a hinge assembly arranged in different positions. As thehousing portions of the portable information handling system are movedbetween the various positions illustrated in FIGS. 3A-D, one or more ofthe snapping bands in the hinge assembly may change state (e.g., fromengage to disengaged, or vice versa), thereby controlling the shape ofthe hinge assembly and the positioning of the housing portions.

FIG. 3A illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a fully open position. Snapping bands 44, 46,and 48 are arranged across hinge assembly 34, between main housingportion 12 and lid housing portion 14. In the illustrated embodiment,the housing portions are arranged in tablet position. Display 28 mayrest on the flat surface created by the housing portions. Snapping bands44, 46, and 48 are in engaged position (e.g., the position illustratedin FIG. 2B), such that each snapping band extends in lengthwise straightposition. Coupling material 26 and stabilizer 22 within hinge assembly34 may also be flat in this position. Gaps 42 may separate snappingbands 44, 46, and 48 such that each snapping band may engage anddisengage independently of each other.

FIG. 3B illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a partially open position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, bringing portable information handling system intolaptop position. Display 28 may bend along the curve formed by hingeassembly 34 as it stretches between the housing portions. Snapping bands44 may disengage such that the band begins to curl, as illustrated inFIG. 2A. The force of the lengthwise curl may apply a closing force onhinge assembly 34. However, snapping bands 46 and 48 may remain inengaged position (as illustrated in FIG. 2B), such that each snappingband extends in lengthwise straight position. Coupling material 26 andstabilizer 22 within hinge assembly 34 may bend near snapping bands 44,but otherwise remain flat near snapping bands 46 and 48. Couplingmaterial 26, stabilizer 22, and the force of the lengthwise curl fromsnapping bands 44 may hold lid housing portion 14 in positions relativeto main housing portion 12.

FIG. 3C illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a partially open position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, such that portable information handling system 10 isin laptop position. Snapping bands 44 and 46 may disengage such that thebands begin to curl lengthwise. The force of the lengthwise curls mayapply an increased (compared to arrangement discussed above with respectto FIG. 3B) closing force on hinge assembly 34. Snapping bands 48 mayremain in engaged position, extended in lengthwise straight position.Coupling material 26 and stabilizer 22 within hinge assembly 34 may bendnear snapping bands 44 and 46, but otherwise remain flat near snappingbands 48. Coupling material 26, stabilizer 22, and the force of thelengthwise curl from snapping bands 44 and 46 may hold lid housingportion 14 in position relative to main housing portion 12.

FIG. 3D illustrates a gap staged arrangement of snapping bands in ahinge assembly arranged in a close position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, such that portable information handling system 10 isin closed position. Snapping bands 44, 46 and 48 may disengage such thatthe bands begin to curl lengthwise. The force of the lengthwise curlsmay apply an increased (compared to arranged discussed above withrespect to FIGS. 3A-C) closing force on hinge assembly 34. Couplingmaterial 26 and stabilizer 22 within hinge assembly 34 may bend nearsnapping bands 44, 46, and 48. Coupling material 26, stabilizer 22, andthe force of the lengthwise curl from snapping bands 44, 46 and 48 mayhold lid housing portion 14 in position relative to main housing portion12.

As the housing portions of the portable information handling system arerotated between different positions, one or more of the snapping bandsin the hinge assembly may engage. The engaging of a snapping band mayincrease the rigidity of hinge assembly 34, and thus increase thestability to the housing portions of the system. The snapping bands inthe hinge assembly may be staged to engage at particular angles ofrotation that represent desirable positions of portable informationhandling system. Stabilizer 22, with its rigidity, may hold hingeassembly at particular angles between the engagement and disengagementof snapping bands. The number, size, and placement of snapping bands maybe selected based on the design, structural integrity, performance,cost, and/or durability of hinge assembly 34 and/or portable informationhandling system 10.

In some embodiments, the snapping bands may be varied in placement,material, and/or dimension (e.g., the curvature of one or more of theaxes, length, width, and/or the thickness of the material). For example,snapping bands 44 may be the first snapping bands to engage when lidhousing portion 14 is raised from tablet position to laptop position. Assuch, snapping bands 44 may experience the strongest rotational force(e.g., in the direction of maintaining the hinge assembly open) causedby the weight of lid housing portion 14. Snapping bands 44 may thereforebe comprised of thicker and/or more rigid material (compared to snappingbands 46 and 48), and/or sized differently (e.g., wider band and/orsmaller lengthwise curve) to increase the closing force applied by theband on the hinge assembly.

FIGS. 4A-D illustrate a stagger staged arrangement of snapping bands ina hinge assembly arranged in different positions. As the housingportions of the portable information handling system are moved betweenthe various positions illustrated in FIG. 4A-D, one or more of thesnapping bands in the hinge assembly may change state (e.g., from engageto disengaged, or vice versa), thereby controlling the shape of thehinge assembly and the positioning of the housing portions.

FIG. 4A illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a fully open position. Snapping bands 36, 38,and 40 are arranged in parallel across portions of hinge assembly 34,between main housing portion 12 and lid housing portion 14. In theillustrated embodiment, the housing portions are arranged in tabletposition. Display 28 may rest on the flat surface created by the housingportions. Snapping bands 36, 38, and 40 are in engaged position (e.g.,as illustrated in FIG. 2B), such that each snapping band extends inlengthwise straight position. Coupling material 26 and stabilizer 22within hinge assembly 34 may also be flat in this position. Snappingbands 36, 38, and 40 may be placed at different locations along thelength of hinge assembly 34 such that each may engage and disengageindependently of each other.

FIG. 4B illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a partially open position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, bringing portable information handling system intolaptop position. Display 28 may bend along the curve formed by hingeassembly 34 as it stretches between the housing portions. Snapping bands40 may disengage such that the bands begin to curl, as illustrated inFIG. 2A. The force of the lengthwise curl may apply a closing force onhinge assembly 34. Snapping bands 36 and 38 may remain in engagedposition, such that each snapping band extends in a lengthwise straightposition. Snapping bands 36 and 38 in engaged position may maintainportions of hinge assembly 34 in a relatively flat position. Snappingbands 36 and 38 in engaged position may also limit and/or preventcertain portions of snapping bands 40 from curling lengthwise. Couplingmaterial 26 and stabilizer 22 within hinge assembly 34 may bend near thecurling portions of snapping bands 40, but otherwise remain flat nearsnapping bands 36 and 38. Coupling material 26, stabilizer 22, and theforce of the lengthwise curl from snapping band 40 may hold lid housingportion 14 in positions relative to main housing portion 12.

FIG. 4C illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a partially open position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, such that portable information handling system 10 isin laptop position. Snapping bands 40 and 38 may disengage such that thebands begin to curl, as illustrated in FIG. 2A. The force of thelengthwise curls may apply an increased (compared to arranged discussedabove with respect to FIG. 4B) closing force on hinge assembly 34.Snapping bands 36 may remain in engaged position, such that eachsnapping band extends in lengthwise straight position. Snapping bands 36in engaged position may maintain portions of hinge assembly 34 and/orsnapping bands 38 and 40 in a relatively flat position. Couplingmaterial 26 and stabilizer 22 within hinge assembly 34 may bend near thecurling portions of snapping bands 40 and 38, but otherwise remain flatnear snapping bands 36. Coupling material 26, stabilizer 22, and theforce of the lengthwise curl from snapping bands 40 and 38 may hold lidhousing portion 14 in position relative to main housing portion 12.

FIG. 4D illustrates a stagger staged arrangement of snapping bands in ahinge assembly arranged in a close position. In the illustratedembodiment, lid housing portion 14 may be rotated relative to mainhousing portion 12, such that portable information handling system 10 isin closed position. Snapping bands 36, 38, and 40 may disengage suchthat the bands begin to curl, as illustrated in FIG. 2A. The force ofthe lengthwise curls may apply an increased (compared to arrangeddiscussed above with respect to FIGS. 4A-C) closing force on hingeassembly 34. Coupling material 26 and stabilizer 22 within hingeassembly 34 may bend near snapping bands 44, 46, and 48. Couplingmaterial 26, stabilizer 22, and the force of the lengthwise curl fromsnapping bands 36, 38, and 40 may hold lid housing portion 14 inposition relative to main housing portion 12.

Similar to the gap staged hinge assembly discussed above with respect toFIGS. 3A-D, one or more of the snapping bands in the hinge assembly mayengage as the housing portions of the portable information handlingsystem are rotated between different positions. The engaging of asnapping band may increase the rigidity in the hinge assembly, and thusincrease the stability to the housing portions of the system.Accordingly, the snapping bands in the hinge assembly may be staged toengage at particular angles of rotation that represent desirablepositions of portable information handling system. Stabilizer 22, withits rigidity, may help hold hinge assembly at particular angles betweenthe engagement and disengagement of snapping bands. The number, size,and placement of snapping bands may be selected based on the design,structural integrity, performance, and/or durability of hinge assembly34 and/or portable information handling system 10.

In some embodiments, the snapping bands may be varied in placement,material, and/or dimension (e.g., the curvature of one or more of theaxes, length, width, and/or the thickness of the material). For example,snapping band 40 may be the first snapping band to engage when lidhousing portion 14 is raised from tablet position to laptop position. Assuch, snapping band 40 may experience the strongest rotational forcecaused by the weight of lid housing portion 14. Snapping band 40 maytherefore be comprised of thicker and/or more rigid material (comparedto snapping bands 36 and 38), and/or sized differently (e.g., largerwidth in snapping band 44) to increase the closing force applied by theband on the hinge assembly. Similarly, snapping bands 36 may be the lastto disengage as the housing portions are rotated to closed position. Assuch, snapping bands 36 may need increased strength in engaged position(e.g., with an increased widthwise curvature) to offset the closingforce of disengaged snapping bands 36 and 38.

The elements in hinge assembly 34 may selected to ensure a minimum bendradius of the hinge assembly. Minimum bend radius 52 illustrated inFIGS. 3-4 may ensure that display 28 does not bend past its recommendedbend radius (e.g., the maximum bend that display 28 can withstandwithout compromising the structural integrity and continued operation ofthe display). Thus, hinge assembly 34 may protect display 28 from damagewhile also enabling the rotation of housing portions of the portableinformation handling system.

The hinge assembly elements in FIGS. 3-4 are for illustrative purposesonly. The number, dimensions, placement, and materials of variouselements comprising hinge assembly 34 (e.g., snapping bands 44, 46 and48, and gaps 42 of FIGS. 3A-D, snapping bands 36, 38, and 40 of FIGS.4A-D, and coupling material 26, stabilizer 22) may be selected based ona desired operation, performance, durability, cost, and/or performanceof hinge assembly 34. For example, the elements may be selected toachieve a desired rigidity in the hinge assembly, such that a certainminimum force is required to rotate the lid housing portion relative tothe main housing portion. More or fewer stages of snapping bands may beimplemented in hinge assembly 34.

FIG. 5 illustrates an example method 500 for rotationally couplinghousing portions of an information handling system. Method 500 may beginat step 502, where the housing portions of the information handlingsystems are coupled to a hinge assembly. The hinge assembly may permitthe housing portions to rotate to different positions from each other,including for example, closed, laptop, and tablet positions discussedabove with respect to FIG. 2. Each housing portion (e.g., main housingportion 12 and lid housing portion 14 illustrated in FIGS. 2-4) maycouple to the hinge assembly.

In step 504, method 500 stages one or more snapping bands in the hingeassembly. In some embodiments, the snapping bands may be arranged in agap staged formation as discussed above with respect to FIGS. 3A-D. Insome embodiments, snapping bands may be arranged in a stagger stagedformation as discussed above with respect to FIGS. 4A-D. In certainembodiments, snapping bands may be arranged in both a gap stagedformation and a stagger staged formation. The snapping bands of thehinge assembly may support the hinge assembly as the housing portions ofthe information handling system are rotated to different positionsrelative to each other.

In step 506, method 500 adds one or more stabilizers to the hingeassembly. As explained above with respect to FIG. 2, the stabilizer maybe comprised of a rigid yet bendable material that changes shape (e.g.,bend or fold) in response to applied force. The rigidity of thestabilizer may affect how much force is required to the rotate hingeassembly open and closed.

In step 508, method 500 places a flexible display over the housingportions and hinge assembly. For example, the flexible display may be anOLED, as discussed in more detail with respect to FIG. 2. The flexibledisplay may bend as the housing portions of the information handlingsystem are rotated to different positions relative to each other.

In step 510, method 500 places an elastic cover over the reverse side ofhinge assembly. The elastic cover may extend over the hinge assemblybetween the housing portions of the information handling system (e.g.,similar to elastic cover 29 illustrated in FIG. 2). The elastic covermay protect the elements of the hinge assembly (e.g., snapping bands,stabilizer, and/or coupling material) from direct contact by objects anddebris external to the portable information handling system. The elasticcover may also provide stability to hinge assembly by restricting themovement of various elements of the assembly. After step 510, method 500may end.

Method 500 may be implemented in any suitable manner. It is noted thatcertain steps or operations described in method 500 may be optional ormay be rearranged in different embodiments.

Herein, “or” is inclusive and not exclusive, unless expressly indicatedotherwise or indicated otherwise by context. Therefore, herein, “A or B”means “A, B, or both,” unless expressly indicated otherwise or indicatedotherwise by context. Moreover, “and” is both joint and several, unlessexpressly indicated otherwise or indicated otherwise by context.Therefore, herein, “A and B” means “A and B, jointly or severally,”unless expressly indicated otherwise or indicated otherwise by context.

The scope of this disclosure encompasses all changes, substitutions,variations, alterations, and modifications to the example embodimentsdescribed or illustrated herein that a person having ordinary skill inthe art would comprehend. The scope of this disclosure is not limited tothe example embodiments described or illustrated herein. Moreover,although this disclosure describes and illustrates respectiveembodiments herein as including particular components, elements,features, functions, operations, or steps, any of these embodiments mayinclude any combination or permutation of any of the components,elements, features, functions, operations, or steps described orillustrated anywhere herein that a person having ordinary skill in theart would comprehend. Furthermore, reference in the appended claims toan apparatus or system or a component of an apparatus or system beingadapted to, arranged to, capable of, configured to, enabled to, operableto, or operative to perform a particular function encompasses thatapparatus, system, component, whether or not it or that particularfunction is activated, turned on, or unlocked, as long as thatapparatus, system, or component is so adapted, arranged, capable,configured, enabled, operable, or operative.

What is claimed is:
 1. An information handling system comprising: ahousing having a first housing portion and a second housing portion; ahinge assembly coupling the first and second housing portions, the hingeassembly comprising: a first snapping band with a bi-stable structurehaving an engaged and a disengaged position, the first snapping bandconfigured to engage when the first and second housing portions arerotated at a first angle; and a second snapping band with a bi-stablestructure having an engaged and a disengaged position, the secondsnapping band configured to engage when the first and second housingportions are rotated at a second angle; wherein the first snapping bandis configured to remain engaged when the first and second housingportions are rotated between the first angle and the second angle; and aflexible display coupled to the first housing portion and the secondhousing portion, the flexible display covering the hinge assembly, theflexible display configured to bend when the first and second housingportions are rotated.
 2. The system of claim 1, wherein the hingeassembly further comprises a stabilizer material, the stabilizermaterial configured to stabilize the first and second housing portionsbetween the first and second angles.
 3. The system of claim 1, whereinthe second snapping band is configured to disengage when the first andsecond housing portions are rotated between the second angle and thefirst angle, wherein the first snapping band is configured to disengagewhen the first and second housing portions are rotated from the firstangle to a closed position.
 4. The system of claim 1, wherein the firstsnapping band is coupled to the first housing portion and the secondsnapping band is coupled to the second housing portion.
 5. The system ofclaim 4, wherein the first snapping band is separated from the secondsnapping band by a gap.
 6. The system of claim 1, wherein the firstsnapping band has a different length than the second snapping band. 7.The system of claim 1, wherein the first snapping band is a differentthickness than the second snapping band.
 8. A method of rotationallycoupling housing portions of an information handling system, comprising:rotationally coupling a first housing portion and a second housingportion of the information handling system with a hinge assembly, thehinge assembly comprising: a first snapping band with a bi-stablestructure having an engaged and a disengaged position, the firstsnapping band configured to engage when the first and second housingportions are rotated at a first angle; and a second snapping band with abi-stable structure having an engaged and a disengaged position, thesecond snapping band configured to engage when the first and secondhousing portions are rotated at a second angle; wherein the firstsnapping band is configured to remain engaged when the first and secondhousing portions are rotated between the first angle and the secondangle; and coupling a flexible display to the first housing portion andthe second housing portion, the flexible display covering a portion ofthe hinge assembly, the flexible display configured to bend when thefirst and second housing portions are rotated.
 9. The method of claim 8,wherein the hinge assembly further comprises a stabilizer material, thestabilizer material configured to stabilize the first and second housingportions between the first and second angles.
 10. The method of claim 8,wherein the second snapping band is configured to disengage when thefirst and second housing portions are rotated between the second angleand the first angle, wherein the first snapping band is configured todisengage when the first and second housing portions are rotated fromthe first angle to a closed position.
 11. The method of claim 8, whereinthe first snapping band is coupled to the first housing portion and thesecond snapping band is coupled to the second housing portion.
 12. Themethod of claim 11, wherein the first snapping band is separated fromthe second snapping band by a gap.
 13. The method of claim 8, whereinthe first snapping band has a different length than the second snappingband.
 14. The method of claim 8, wherein the first snapping band is adifferent thickness than the second snapping band.